WordReference Random House Unabridged Dictionary of American English © 2020
noc•u•ous (nok′yo̅o̅ əs),USA pronunciation adj.
- likely to cause damage or injury;
- Latin nocuus harmful, injurious, equivalent. to noc(ēre) to harm + -uus deverbal adjective, adjectival suffix; see -ous
'nocuous' also found in these entries: